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United States Patent | 6,122,319 |
Lee ,   et al. | September 19, 2000 |
An apparatus and method for detecting a motion vector by converting an input image into gradient pattern information and comparing gradient pattern information in a motion detection area of a current field with representative pattern information of a previous field. A gradient pattern converter converts a gray level of each pixel in a motion detection area in an input image into a gradient bit pattern by comparing differences between the gray level of the pixel and gray levels of its adjacent pixels with an arbitrary threshold value. A motion vector detector forms a search area sequentially in the motion detection area, compares a gradient bit pattern of the search area with a representative bit pattern of a previous image to calculate and accumulate correlation values, and determines a difference of coordinates of a search area which results in a maximum correlation value and coordinates of the representative bit pattern as a motion vector.
Inventors: | Lee; Gun-hee (Suwon, KR); Ko; Sung-jea (Seoul, KR) |
Assignee: | Samsung Electronics Co., Ltd. (Kyungki-do, KR) |
Appl. No.: | 169013 |
Filed: | October 9, 1998 |
Oct 10, 1997[KR] | 97-52121 |
Current U.S. Class: | 375/240.16; 348/207.99; 348/699 |
Intern'l Class: | H04N 007/12 |
Field of Search: | 348/699,416,208,207,420 382/237 375/240 386/109,111 358/426,461.2,461.3 |
5157732 | Oct., 1992 | Ishii et al. | 348/208. |
5563652 | Oct., 1996 | Toba et al. | 348/208. |
5648815 | Jul., 1997 | Ioga | 348/208. |
5734441 | Mar., 1998 | Kondo et al. | 348/208. |
5734933 | Mar., 1998 | Sekine et al. | 348/208. |
5812197 | Sep., 1998 | Chan et al. | 348/699. |
5844630 | Dec., 1998 | Yamauchi | 348/699. |
5861916 | Jan., 1999 | Sekine et al. | 348/208. |
5909242 | Jun., 1999 | Kobayashi et al. | 348/208. |
5946041 | Aug., 1999 | Morita | 348/416. |
Foreign Patent Documents | |||
2 315 946 | Feb., 1998 | GB | . |
90/01744 | Feb., 1990 | WO | . |